Non-Gaussianity after BICEP2

Abstract

We analyze primordial non-Gaussianity in single field inflationary models when the tensor/scalar ratio is large. Our results show that detectable levels of non-Gaussianity $f_{NL}\sim 50$ are still possible in the simplest class of models described by the effective theory of inflation. However, the shape is very tightly constrained, making a sharp prediction that could be confirmed or falsified by a future detection of non-Gaussianity.

5 pages, 2 figures. References and minor clarifications added. Version published in Phys. Rev. Lett

References in corpus (6)

• The Effective Field Theory of Inflation
• A Natural Framework for Chaotic Inflation
• An Ignoble Approach to Large Field Inflation
• Trapped Inflation
• A Naturally Large Four-Point Function in Single Field Inflation
• ${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential

Cited by in corpus (3)

• Gravitational Waves and the Scale of Inflation
• B-modes and the sound speed of primordial fluctuations
• Reanalyzing the upper limit on the tensor-to-scalar perturbation ratio r_T in a quartic potential inflationary model